I'm sure Supercells are much more common than once ever 10 years - they are
just not reported as such. In particular the "Shallow Supercell".

There was a possible Shallow Supercell reported in Oxfordshire in March -
unconfirmed though.

Mark.

"Joe, Bedford." wrote in message
news:adugc.19018$4N3.18154@newsfe1-win...

"JPG" wrote in message
...
On Sun, 18 Apr 2004 09:12:22 +0000 (UTC), Simon Wyndham
wrote:

Hi,

Layperson question. Has a supercell TS ever been recorded in the UK
before?

The Hampstead storm of August 1975 was a supercell. Google on
Hampstead storm for details.

As for their frequency, stormchasers and recorder/researchers such as
Les Crossan and Trevor Harley might have an idea, I would guess about
once a decade.

JPG

Much has been made of the discovery of the supercell in the UK,
but was this discovery made from observing other countries, or from an
actual occurrence in the UK?

Simon


But about Hampstead here
http://www.weather-uk.com/hampstead/page3.html